A power-off disc dual-brake brake

Abstract

The application relates to a power-off disc type double-braking brake and relates to the technical field of elevator brakes. The brake comprises a static friction disc fixed on a traction machine shell, a movable friction disc slidably connected on a shaft, a mounting shell fixed on the shell, and a shaft of the traction machine sequentially penetrating the static friction disc, the movable friction disc and the mounting shell. An installation groove is arranged in the mounting shell, an armature is inserted in the installation groove, the armature can move in the installation groove towards or away from the shell, a plurality of mounting holes are formed on the side, away from the shell, of the installation groove, an electromagnet is inserted in the mounting hole, a pushing spring is fixed at both ends of the electromagnet, a plurality of excitation coils are fixed in the mounting shell, and the plurality of excitation coils are radially arranged with the center of the mounting shell as the center. The application has the effect that the same size of current reaches greater and more stable magnetic force.

Description

Technical Field

[0001] This application relates to the field of elevator brakes, and more particularly to a power-off disc double brake. Background Technology

[0002] Elevator brakes are crucial safety devices in elevators, and their safety and reliability are essential for ensuring safe elevator operation. A bidirectional thrust elevator brake generates bidirectional electromagnetic thrust when energized, disengaging the braking mechanism from the rotating parts of the motor (i.e., releasing it). When power is off, the electromagnetic force disappears, and under the pressure of an external braking spring, a friction brake (hereinafter referred to as the brake) is formed, providing de-energization braking. It is mainly used in conjunction with the drive motor of an escalator traction machine to form an electromagnetic braking three-phase asynchronous motor for escalators, widely applicable in situations requiring smooth stopping, rapid starting, and safe (risk-prevention) braking during power outages.

[0003] In related technologies, Chinese patent CN1031560C discloses a disc brake for elevators, rigidly fixed to an elevator pulley shaft. This disc brake includes a turntable and a non-turntable. The non-turntable is pressed against the turntable by multiple springs and disengaged from the turntable by an electromagnet. The gaps between the non-turntable and the turntable, as well as between the electromagnet and the non-turntable, are adjusted by an adjustable spring seat.

[0004] Under the same current, the electromagnetic force generated by an electromagnet is constant, which prevents an increase in the reaction speed of driving the turntable. Consequently, the magnitude of the attractive force exerted by the electromagnet on the turntable cannot be increased, and therefore needs improvement. Summary of the Invention In order to improve the problem that the same amount of current cannot achieve a greater magnetic force, thus failing to achieve better energy-saving effect, this application provides a power-off disc dual brake.

[0005] The present application provides a power-off disc brake with dual braking system, which adopts the following technical solution: A power-off disc brake for controlling the rotation or stop of a traction machine, comprising: A stationary friction disc is provided in the traction machine, which includes a housing and a shaft, with the stationary friction disc fixed to the housing. A movable friction disc is sleeved on a shaft, and the movable friction disc can move along the length of the shaft. The movable friction disc can abut against a stationary friction disc. The mounting shell is fixedly connected to the housing and located on the side of the stationary friction disk away from the housing. The mounting shell has a mounting groove on the side near the stationary friction disk, and a number of mounting holes are opened on the side of the mounting groove away from the housing. Several electromagnets, each corresponding to a mounting hole and disposed within the mounting hole; Several propulsion springs, each corresponding to an electromagnet and mounted on the electromagnet; Several excitation coils are fixedly installed inside the mounting housing; An armature is inserted into the mounting slot and can move within the mounting slot toward or away from the housing. Among them, several of the excitation coils are arranged radially with the center of the mounting shell as the center.

[0006] By adopting the above technical solution, during operation, the traction machine's shaft rotates, causing the moving friction disc to rotate synchronously. When the traction machine's shaft needs to stop rotating, the excitation coil is de-energized, meaning the entire brake is de-energized. The push spring applies a force to the armature, pushing it towards the housing. This causes the armature to contact the moving friction disc and push it towards the stationary friction disc until they come into contact. At this point, the opposing sidewalls of the moving friction disc are compressed by the armature and the stationary friction disc, generating friction that stops the moving friction disc's rotation, thus stopping the traction machine's shaft. The stationary friction disc prevents wear between the moving friction disc and the housing. When the excitation coil is energized, an electromagnetic field is generated throughout the mounting housing. The electromagnet then generates an electromagnetic force, attracting the armature to move away from the housing. This causes the armature to overcome the spring force of the propulsion spring and press against the inner wall of the mounting groove on the side furthest from the housing. At this point, the armature separates from the moving friction disc, and the moving friction disc loses its compressive friction, thus removing its restraint and allowing the traction machine shaft to rotate normally with the moving friction disc. Furthermore, the excitation coil is evenly distributed within the mounting housing. When current is applied, the magnetic force generated within the limited space of the housing becomes stronger and more stable. With the same current applied, the response speed of driving the moving friction disc is improved compared to existing technologies, the attraction force exerted by the electromagnet on the moving friction disc is increased, and energy consumption is significantly improved.

[0007] Optionally, the mounting housing is provided with a manual release component, the manual release component comprising: The handle is rotatably attached to the side of the mounting box away from the housing; A movable rod is inserted into the mounting housing and arranged along the moving direction of the armature. The movable rod can rotate within the mounting housing, and one end of the movable rod extends out of the mounting housing and is fixed to the handle. A movable block is disposed inside the mounting housing. The movable rod passes through the movable block and is threadedly connected to the movable block. A movable groove is provided on the side wall of the armature along the moving direction of the armature. The movable block is inserted into the movable groove and can move in the movable groove.

[0008] By adopting the above technical solution, when the excitation coil is not energized, the moving friction disc abuts against the stationary friction disc under the action of the propulsion spring. At this time, the moving block abuts against the inner wall of the moving groove on the side away from the housing. Turning the handle causes the moving rod to rotate. Because the moving rod is threadedly connected to the moving block, the moving block moves along the length of the moving rod, thereby driving the armature to move away from the housing. This causes the moving friction disc to lose its compressive force, realizing the release of the moving friction disc even without energization, making operation convenient.

[0009] Optionally, a movable plate is fixed to one end of the movable rod extending out of the mounting housing, the handle is fixed to the movable plate, and a plurality of balls are embedded on the side of the mounting housing away from the housing, the sidewall of the balls abutting against the side of the movable plate near the housing.

[0010] By adopting the above technical solution, when the handle is turned, the moving plate is driven to rotate around the central axis of the moving rod, so that the moving plate slides against the side wall of the ball, thereby driving the ball to rotate. This changes the sliding friction between the moving plate and the side wall of the mounting shell into rolling friction, thereby reducing the friction force, making it easier for the handle to drive the moving rod to rotate, and saving more effort.

[0011] Optionally, a rubber sleeve is fitted onto the movable friction disc, and the sidewall of the rubber sleeve can abut against the armature.

[0012] By adopting the above technical solution, when the propulsion spring pushes the armature to abut against the rubber sleeve on the moving friction disk, the moving friction disk is still rotating. The rubber sleeve plays a protective role, preventing the moving friction disk from directly contacting the armature, thus preventing sliding friction and wear between the side wall of the moving friction disk and the armature. Similarly, when the armature pushes the moving friction disk to move, the other side of the rubber sleeve abuts against the stationary friction disk, preventing the other side of the moving friction disk from directly contacting the stationary friction disk and causing wear, thereby extending the service life of the moving friction disk.

[0013] Optionally, a tension spring is provided on the outer wall of the mounting shell. One end of the tension spring is fixed to the mounting shell, and the other end is fixed to the handle. The movable plate is located between the two ends of the tension spring. When the armature abuts against the movable friction disc, the movable plate and the tension spring are on the same straight line and the tension spring is in a stretched state.

[0014] By adopting the above technical solution, in the initial state, the tension spring and the handle are on the same straight line and have the largest deformation, but the handle cannot be moved. When it is necessary to release the moving friction disc, the handle is rotated, so that an angle is formed between the handle and the tension spring. Under the action of its own elastic force, the tension spring pulls the handle closer to the connection between the tension spring and the mounting shell, so that the handle is rotated while being pulled by the tension spring, thus making it easier to rotate the handle and requiring less effort.

[0015] Optionally, the mounting housing is provided with an adjustment device for adjusting the tension of the propulsion spring. The adjustment device includes a drive component and an adjustment component. The drive component is located on the mounting housing, and the adjustment component is connected to the propulsion spring. The drive component drives the adjustment component to move the end of the propulsion spring away from the stationary friction disc toward the point closer to or away from the housing.

[0016] By adopting the above technical solution, after long-term use, the propulsion spring is prone to loosening, which affects the effect of stopping the moving friction disc. At this time, the drive component drives the adjustment component to move the propulsion spring closer to the housing, changing the distance between the propulsion spring and the housing, thereby changing the degree of compression of the propulsion spring, that is, changing the tension of the propulsion spring, and extending the service life of the propulsion spring.

[0017] Optionally, the driving component includes: A drive rod is rotatably connected to the mounting housing. The drive rod is arranged along the moving direction of the armature, and a drive groove is provided on the side wall of the drive rod. The drive disc is connected to the drive rod and located at the end of the drive rod away from the housing.

[0018] By adopting the above technical solution, when it is necessary to adjust the position of the propulsion spring, the drive disk is rotated, causing the drive rod to rotate, thereby driving the adjustment component to move along the length direction of the drive rod, which in turn drives the propulsion spring to move, thus realizing the adjustment of the position of the propulsion spring.

[0019] Optionally, the adjustment component includes: An adjusting ring is located inside the mounting housing and can move along the direction of armature movement; the end of the push spring away from the housing is fixed to the adjusting ring. An adjusting block is fixed on the adjusting block, which is inserted into the drive groove and can move in the drive groove. The drive rod rotates to drive the adjusting block to move along the length direction of the drive rod.

[0020] By adopting the above technical solution, when the drive rod rotates, the adjusting ring will not rotate with the drive rod. Instead, the inner wall of the drive groove abuts against the adjusting block, guiding the adjusting block to move along the trajectory of the drive groove. This causes the adjusting block to eventually move along the length of the drive rod, causing the adjusting ring to drive the propulsion spring to move closer to or further away from the housing, changing the compression degree of the propulsion spring, i.e., changing the tension of the propulsion spring, and extending the service life of the propulsion spring.

[0021] Optionally, the drive rod is provided with a fixing component for limiting the rotation of the drive rod, the fixing component including: A fixed rod is provided, and an insertion hole is provided through the end wall of the drive rod. The fixed rod is inserted into the insertion hole and can move in the insertion hole. The end of the fixed rod away from the housing is fixed to the drive disk. The side wall of the housing is provided with a fixing hole for the fixed rod to be inserted into. A fixing block is fixedly mounted on the side wall of a fixing rod. The fixing block is located at one end of the fixing rod near the housing. A positioning hole for inserting the fixing block is provided on the inner wall of the insertion hole. A plurality of limiting holes for inserting the fixing block are provided on the housing. The limiting holes are connected to the fixing hole. The plurality of limiting holes are arranged radially with the center of the fixing hole as the center.

[0022] By adopting the above technical solution, in the initial state, the end of the fixing rod is inserted into the fixing hole, and the fixing block is inserted into the limiting hole at the corresponding position. When it is necessary to adjust the tension of the push spring, the fixing rod is moved so that the fixing rod is pulled out of the fixing hole and the fixing block is inserted into the positioning hole. Then, the drive disk is rotated so that the fixing rod rotates. The side wall of the fixing block abuts against the inner wall of the positioning hole, which plays a limiting role. This causes the drive rod to rotate with the rotation of the fixing rod, thereby driving the adjusting ring to move and realizing the adjustment of the distance between the push spring and the housing.

[0023] After the tension of the push spring is adjusted, move the fixing rod closer to the housing until the end of the fixing rod is inserted into the fixing hole, and the fixing block is inserted into the limiting hole corresponding to the positioning hole. Under the restriction of the inner wall of the limiting hole, the fixing block will not rotate about the central axis of the fixing rod. At the same time, the fixing block also abuts against the inner wall of the positioning hole, so that the fixing rod will not drive the rod to rotate, thus fixing the driving rod and keeping the push spring in the adjusted position.

[0024] Optionally, a magnet is provided on the inner wall of the fixing hole, and an iron sheet that attracts the magnet is provided on the end wall of the fixing rod.

[0025] By adopting the above technical solution, when the end of the fixing rod is inserted into the fixing hole, the magnet attracts the iron sheet, making it difficult for the fixing rod to be pulled out of the fixing hole, thus increasing the stability of the fixing rod inserted into the fixing hole.

[0026] In summary, this application includes at least one of the following beneficial effects: 1. The excitation coils are evenly distributed inside the mounting housing. When current is applied, the magnetic force generated in the limited space of the mounting housing is stronger and more stable. When the same amount of current is applied, compared with the existing technology, the response speed of driving the moving friction disc is improved, the attraction force of the electromagnet on the moving friction disc is increased, and energy saving is achieved. 2. When the excitation coil is not energized, the moving friction disc abuts against the stationary friction disc under the action of the propulsion spring. At this time, the moving block abuts against the inner wall of the moving groove on the side away from the housing. Turning the handle causes the moving rod to rotate. Because the moving rod is threadedly connected to the moving block, the moving block moves along the length of the moving rod, thereby driving the armature to move away from the housing. This causes the moving friction disc to lose its compressive force, enabling the moving friction disc to be released even without energization, making operation convenient. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the de-energized disc brake according to an embodiment of this application; Figure 2 This is a cross-sectional view of the de-energized disc brake according to an embodiment of this application; Figure 3 This is a schematic diagram of the internal structure of the de-energized disc brake according to an embodiment of this application; Figure 4 for Figure 2 Enlarged view of point A in the middle; Figure 5 for Figure 3 Enlarged view of point B in the middle.

[0028] In the diagram: 10. Stationary friction disc; 20. Moving friction disc; 21. Spline sleeve; 30. Mounting housing; 31. Mounting slot; 32. Mounting hole; 40. Manual release assembly; 41. Handle; 42. Moving rod; 43. Moving block; 50. Adjustment device; 51. Drive assembly; 511. Drive rod; 5111. Drive slot; 5112. Insertion hole; 5113. Positioning hole; 512. Drive disc; 52. Adjustment assembly; 521. Adjusting ring; 522. Adjusting block; 60. Fixing assembly; 61. Fixing rod; 611. Iron sheet; 62. Fixing block; 70. Flat key; 80. Electromagnet; 90. Push spring; 110. Excitation coil; 120. Armature; 121. Moving slot; 130. Rubber sleeve; 140. Moving plate; 150. Ball bearing; 160. Tension spring; 170. Fixing hole; 171. Limiting hole; 180. Magnet. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0030] This application discloses a power-off disc brake with dual brakes. (Refer to...) Figure 1 and Figure 2The de-energized disc brake is used to control the stop or rotation of the traction machine. The brake includes a stationary friction disc 10. The traction machine includes a housing and a shaft. The shaft is rotatably connected to the housing. The stationary friction disc 10 is fixed to the housing. The shaft passes through the stationary friction disc 10. Several flat keys 70 are fixed on the shaft and arranged along the length of the shaft. The flat keys 70 are evenly distributed along the circumference of the shaft. Spline sleeves 21 are fitted on the flat keys 70. The grooves on the spline sleeves 21 correspond one-to-one with the flat keys 70. The flat keys 70 are inserted into the grooves on the spline sleeves 21. The spline sleeves 21 can move on the flat keys 70. The spline sleeve 21 is fixed with a movable friction disc 20. The movable friction disc 20 includes two opposing semi-circular wollastonite disc-shaped structures. The movable friction disc 20 is fixedly connected to the spline sleeve 21. A rubber sleeve 130 is fitted on the movable friction disc 20. When the side wall of the movable friction disc 20 is squeezed during rotation, the rubber pad plays a protective role, making the side wall of the movable friction disc 20 less prone to friction damage and extending the service life of the movable friction disc 20.

[0031] Reference Figure 2 and Figure 3 A mounting shell 30 is bolted to the housing, and a shaft also passes through the mounting shell 30. The stationary friction disc 10 and the moving friction disc 20 are both located between the mounting shell 30 and the housing. The mounting shell 30 includes two opposing magnetic rings, each corresponding to a disc-shaped structure. Several excitation coils 110 are installed inside the mounting shell 30, encapsulated in epoxy resin. The excitation coils 110 are arranged radially around the center of the mounting shell 30, ensuring symmetrical arrangement and uniform distribution within each magnetic ring.

[0032] Reference Figure 2 and Figure 3 The mounting housing 30 has a mounting groove 31 on the side near the stationary friction disk 10. An armature 120 is inserted into the mounting groove 31 and can move towards or away from the housing within the mounting groove 31. Several mounting holes 32 are provided on the side of the mounting groove 31 away from the stationary friction disk 10. Each mounting hole 32 corresponds to an excitation coil 110 and is located at the center of the excitation coil 110. An electromagnet 80 is inserted into each mounting hole 32, and a push spring 90 is fixed to both ends of the electromagnet 80. The end of the push spring 90 near the housing is fixed to the armature 120.

[0033] When in use, the shaft of the traction machine rotates, and the inner wall of the spline sleeve 21 abuts against the flat key 70, which plays a limiting role, so that the shaft drives the spline sleeve 21 to rotate synchronously, thereby causing the moving friction disc 20 to rotate.

[0034] When the shaft of the traction machine needs to stop rotating, the excitation coil 110 is de-energized, i.e., the entire brake is de-energized. The push spring 90 applies a force to the armature 120, pressing it towards the housing. This causes the armature 120 to come into contact with the moving friction disc 20 and pushes the moving friction disc 20 towards the stationary friction disc 10. At this time, the spline sleeve 21 slides along the length of the flat key 70 until the moving friction disc 20 comes into contact with the stationary friction disc 10. At this time, the opposite sidewalls of the moving friction disc 20 are pressed by the armature 120 and the stationary friction disc 10, generating friction, which causes the moving friction disc 20 to stop rotating. Under the action of the spline sleeve 21 and the flat key 70, the shaft of the traction machine stops rotating.

[0035] When the excitation coil 110 is energized, an electromagnetic field is generated throughout the mounting housing 30. The electromagnet 80 generates an electromagnetic force, attracting the armature 120 to move away from the housing. This causes the armature 120 to overcome the elastic force of the push spring 90 and abut against the inner wall of the mounting groove 31 on the side away from the housing. At this time, the armature 120 separates from the moving friction disc 20, and the moving friction disc 20 loses its compressive friction force, thus freeing it from restraint. This allows the traction machine shaft to rotate normally with the moving friction disc 20. Furthermore, the excitation coil 110 is evenly distributed within the mounting housing 30. When current is applied, the magnetic force generated within the limited space of the mounting housing 30 becomes stronger and more stable. With the same current applied, compared to existing technologies, this improves the response speed of driving the moving friction disc 20, increases the attractive force exerted by the electromagnet on the moving friction disc 20, and is more energy-efficient.

[0036] Reference Figure 1 and Figure 2 In order to release the movable friction disc 20 even when the brake is not energized, a manual release assembly 40 is provided on the mounting housing 30. The manual release assembly 40 includes a handle 41, a moving rod 42, and a moving block 43. The moving rod 42 is arranged along the moving direction of the armature 120 and is rotatably connected inside the mounting housing 30. The end of the moving rod 42 away from the stationary friction disc 10 extends out of the mounting housing 30 and is coaxially fixed with a moving plate 140. Four balls 150 are embedded on the side of the mounting housing 30 away from the stationary friction disc 10. The balls 150 can rotate on the mounting housing 30. The side of the moving plate 140 near the stationary friction disc 10 abuts against the side wall of the balls 150.

[0037] Reference Figure 1 and Figure 2The side wall of the handle 41 is fixed to the movable plate 140. The movable block 43 is sleeved on the movable rod 42 and threadedly connected to the movable rod 42. A movable groove 121 is provided on the side wall of the armature 120 along the length direction of the movable rod 42. One end of the movable block 43 is inserted into the movable groove 121 and can move in the movable groove 121. In the initial state, the mounting shells 30 are in a vertical state, so the handle 41 is in a vertical state. When the armature 120 abuts against the movable friction disk 20, the movable block 43 is located at the end of the movable groove 121 away from the stationary friction disk 10.

[0038] When the handle 41 is turned, the movable plate 140 rotates about the central axis of the movable rod 42, causing the movable plate 140 to slide against the side wall of the ball bearing 150, thereby causing the ball bearing 150 to rotate. This changes the sliding friction between the movable plate 140 and the side wall of the mounting housing 30 into rolling friction, reducing friction and facilitating the rotation of the movable rod 42 by the handle 41. Because the movable rod 42 is threadedly connected to the movable block 43, the movable block 43 moves along the length of the movable rod 42, thereby causing the armature 120 to move away from the housing, i.e., separating from the movable friction disc 20. This causes the movable friction disc 20 to lose its compressive force, allowing the movable friction disc 20 to be released even without power.

[0039] Reference Figure 1 In order to facilitate the rotation of the handle 41, a tension spring 160 is provided on the mounting shell 30. One end of the tension spring 160 is fixed to the side of the mounting shell 30 away from the stationary friction disc 10, and the other end is fixed to the handle 41. In the initial state, the tension spring 160 and the handle 41 are on the same straight line.

[0040] When the handle 41 is turned, an angle is formed between the handle 41 and the tension spring 160. Under the action of its own elasticity, the tension spring 160 pulls the handle 41 to move closer to the connection between the tension spring 160 and the mounting shell 30. This makes the handle 41 rotate while being pulled by the tension spring 160, thus making it easier to turn the handle 41 and requiring less effort.

[0041] Reference Figure 3 After long-term use, the elasticity of the propulsion spring 90 will weaken. In order not to affect the propulsion spring 90's ability to push the armature 120 to squeeze the moving friction disk 20, i.e., not to affect the effect of stopping the moving friction disk 20, an adjustment device 50 for adjusting the tension of the propulsion spring 90 is provided on the mounting shell 30. The adjustment device 50 includes a drive component 51 and an adjustment component 52.

[0042] Reference Figure 3The drive assembly 51 is mounted on the mounting housing 30. The drive assembly 51 includes a drive rod 511 and a drive disk 512. The drive rod 511 is arranged along the moving direction of the armature 120, and one end of the drive rod 511 extends out of the mounting housing 30 and is connected to the drive disk 512, away from the stationary friction disk 10. A drive groove 5111 is formed on the side wall of the drive rod 511, and the drive groove 5111 is arranged in a spiral shape along the circumference of the drive rod 511.

[0043] Reference Figure 2 and Figure 3 The adjustment assembly 52 includes an adjustment ring 521 and an adjustment block 522. The end of the push spring 90 away from the stationary friction disk 10 is fixed to the adjustment ring 521. The adjustment ring 521 can move in the mounting housing 30 towards or away from the stationary friction disk 10. The adjustment block 522 is fixed to the side wall of the adjustment ring 521. The end of the adjustment block 522 away from the adjustment ring 521 is adapted to be inserted into the drive groove 5111.

[0044] When the drive rod 511 rotates, the adjusting ring 521 does not rotate with the drive rod 511. The inner wall of the drive groove 5111 abuts against the adjusting block 522, which guides the adjusting block 522, causing it to move along the trajectory of the drive groove 5111. This causes the adjusting block 522 to eventually move along the length of the drive rod 511, causing the adjusting ring 521 to drive the propulsion spring 90 to move closer to or further away from the housing, changing the compression degree of the propulsion spring 90, i.e., changing the tension of the propulsion spring 90, and extending the service life of the propulsion spring 90.

[0045] Reference Figure 4 and Figure 5 After the position of the push spring 90 is adjusted, in order to fix the push spring 90 in that position, i.e., to restrict the rotation of the drive rod 511, a fixing component 60 is provided on the drive rod 511. The fixing component 60 includes a fixing rod 61 and a fixing block 62. An insertion hole 5112 is provided through the end wall of the drive rod 511. The fixing rod 61 is inserted into the insertion hole 5112 and can move in the insertion hole 5112. The end of the fixing rod 61 away from the stationary friction disk 10 extends out of the insertion hole 5112 and is coaxially fixed with the drive disk 512. The fixing block 62 is integrally formed on the side wall of the fixing rod 61 and is located on the end of the fixing rod 61 near the stationary friction disk 10. A fixing hole 170 and several limiting holes 171 are provided on the side wall of the mounting shell 30. The several limiting holes 171 communicate with the fixing hole 170 and are arranged radially with the center of the fixing hole 170 as the center. A magnet 180 is fixed on the inner wall of the fixing hole 170, and an iron sheet 611 is fixed on the end wall of the fixing rod 61 near the stationary friction disc 10.

[0046] In the initial state, the end of the fixing rod 61 is inserted into the fixing hole 170, and the fixing block 62 is inserted into the limiting hole 171 at the corresponding position. When it is necessary to adjust the tension of the push spring 90, the fixing rod 61 is moved so that the fixing rod 61 is pulled out of the fixing hole 170, and the fixing block 62 is inserted into the positioning hole 5113. Then, the drive disk 512 is rotated so that the fixing rod 61 rotates. The side wall of the fixing block 62 abuts against the inner wall of the positioning hole 5113, which plays a limiting role. This causes the drive rod 511 to rotate with the rotation of the fixing rod 61, thereby driving the adjusting ring 521 to move and realize the adjustment of the distance between the push spring 90 and the housing.

[0047] After the tension of the push spring 90 is adjusted, the fixing rod 61 is moved closer to the housing until the end of the fixing rod 61 is inserted into the fixing hole 170. At this time, the magnet 180 and the iron piece 611 are attracted to each other, making it difficult for the end of the fixing rod 61 to be pulled out of the fixing hole 170. The fixing block 62 is inserted into the limiting hole 171 corresponding to the positioning hole 5113. Under the restriction of the inner wall of the limiting hole 171, the fixing block 62 will not rotate about the central axis of the fixing rod 61. At the same time, the fixing block 62 also abuts against the inner wall of the positioning hole 5113, so that the fixing rod 61 will not drive the rod 511 to rotate, thus fixing the driving rod 511. The push spring 90 maintains the adjusted position unchanged.

[0048] The implementation principle of a power-off disc type dual brake in this application embodiment is as follows: When in use, the shaft of the traction machine rotates, and the inner wall of the spline sleeve 21 abuts against the flat key 70, which plays a limiting role, so that the shaft drives the spline sleeve 21 to rotate synchronously, thereby causing the moving friction disc 20 to rotate.

[0049] When the shaft of the traction machine needs to stop rotating, the excitation coil 110 is de-energized, i.e., the entire brake is de-energized. The push spring 90 applies a force to the armature 120, pressing it towards the housing. This causes the armature 120 to come into contact with the moving friction disc 20 and pushes the moving friction disc 20 towards the stationary friction disc 10. At this time, the spline sleeve 21 slides along the length of the flat key 70 until the moving friction disc 20 comes into contact with the stationary friction disc 10. At this time, the opposite sidewalls of the moving friction disc 20 are pressed by the armature 120 and the stationary friction disc 10, generating friction, which causes the moving friction disc 20 to stop rotating. Under the action of the spline sleeve 21 and the flat key 70, the shaft of the traction machine stops rotating.

[0050] When the excitation coil 110 is energized, the entire mounting shell 30 generates an electromagnetic field, and the electromagnet 80 generates an electromagnetic force, attracting the armature 120 to move away from the shell. This causes the armature 120 to overcome the elastic force of the push spring 90 and abut against the inner wall of the mounting groove 31 on the side away from the shell. At this time, the armature 120 separates from the moving friction disc 20, and the moving friction disc 20 loses its squeezing friction force, thus freeing the moving friction disc 20 from restriction. This allows the shaft of the traction machine to rotate normally with the moving friction disc 20.

[0051] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A de-energized disc brake for controlling the rotation or stop of a traction machine, characterized in that, include: The stationary friction disc (10) is fixed on the housing of the traction machine, which includes a housing and a shaft. A movable friction disc (20) is sleeved on a shaft. The movable friction disc (20) can move along the length of the shaft. The movable friction disc (20) can abut against a stationary friction disc (10). The mounting shell (30) is fixedly connected to the housing and located on the side of the stationary friction disk (10) away from the housing. The mounting shell (30) has a mounting groove (31) on the side close to the stationary friction disk (10), and the mounting groove (31) has several mounting holes (32) on the side away from the housing. Several electromagnets (80) are provided, each corresponding to a mounting hole (32) and disposed within the mounting hole (32); A plurality of propulsion springs (90), wherein each propulsion spring (90) corresponds to an electromagnet (80) and is disposed on the electromagnet (80); Several excitation coils (110) are fixedly installed inside the mounting housing (30); An armature (120) is inserted into the mounting groove (31) and can move within the mounting groove (31) toward or away from the housing; Among them, several of the excitation coils (110) are arranged radially with the center of the mounting shell (30) as the center; The mounting housing (30) is provided with an adjustment device (50) for adjusting the tension of the propulsion spring (90). The adjustment device (50) includes a drive assembly (51) and an adjustment assembly (52). The drive assembly (51) is located on the mounting housing (30). The adjustment assembly (52) is connected to the propulsion spring (90). The drive assembly (51) drives the adjustment assembly (52) to move the end of the propulsion spring (90) away from the stationary friction disc (10) towards the direction of approaching or away from the housing. The driving component (51) includes: A drive rod (511) is rotatably connected to the mounting housing (30). The drive rod (511) is arranged along the moving direction of the armature (120). A drive groove (5111) is provided on the side wall of the drive rod (511). The drive disc (512) is connected to the drive rod (511) and located at the end of the drive rod (511) away from the housing; The adjustment component (52) includes: An adjusting ring (521) is provided inside the mounting housing (30) and can move along the moving direction of the armature (120). The end of the push spring (90) away from the housing is fixed to the adjusting ring (521). An adjusting block (522) is fixed on the adjusting block (522). The adjusting block (522) is inserted into the drive groove (5111) and can move in the drive groove (5111). The drive rod (511) rotates to drive the adjusting block (522) to move along the length direction of the drive rod (511).

2. The de-energized disc brake according to claim 1, characterized in that, The mounting housing (30) is provided with a manual release assembly (40), the manual release assembly (40) comprising: The handle (41) is rotatably connected to the side of the mounting housing (30) away from the housing; A movable rod (42) is inserted into the mounting housing (30) and arranged along the moving direction of the armature (120). The movable rod (42) can rotate inside the mounting housing (30). One end of the movable rod (42) extends out of the mounting housing (30) and is fixed to the handle (41). A movable block (43) is disposed inside the mounting housing (30). The movable rod (42) passes through the movable block (43) and is threadedly connected to the movable block (43). A movable groove (121) is provided on the side wall of the armature (120) along the moving direction of the armature (120). The movable block (43) is inserted into the movable groove (121) and can move in the movable groove (121).

3. The de-energized disc brake according to claim 2, characterized in that, The movable rod (42) has a movable plate (140) fixed at one end extending out of the mounting shell (30). The handle (41) is fixed to the movable plate (140). A plurality of balls (150) are embedded on the side of the mounting shell (30) away from the shell. The sidewall of the balls (150) abuts against the side of the movable plate (140) near the shell.

4. The de-energized disc brake according to claim 1, characterized in that, A rubber sleeve (130) is fitted on the movable friction disc (20), and the side wall of the rubber sleeve (130) can abut against the armature (120).

5. The de-energized disc brake according to claim 3, characterized in that, A tension spring (160) is provided on the outer wall of the mounting shell (30). One end of the tension spring (160) is fixed to the mounting shell (30), and the other end is fixed to the handle (41). The moving plate (140) is located between the two ends of the tension spring (160). When the armature (120) abuts against the moving friction disc (20), the moving plate (140) and the tension spring (160) are on the same straight line and the tension spring (160) is in a stretched state.

6. The de-energized disc brake according to claim 1, characterized in that, The drive rod (511) is provided with a fixing component (60) for limiting the rotation of the drive rod (511), the fixing component (60) including: A fixing rod (61) is provided. The end wall of the driving rod (511) is provided with a through hole (5112). The fixing rod (61) is inserted into the through hole (5112) and can move in the through hole (5112). The end of the fixing rod (61) away from the housing is fixed to the driving disk (512). The side wall of the housing is provided with a fixing hole (170) for the fixing rod (61) to be inserted. A fixing block (62) is fixedly mounted on the side wall of a fixing rod (61). The fixing block (62) is located at one end of the fixing rod (61) near the housing. A positioning hole (5113) for inserting the fixing block (62) is provided on the inner wall of the insertion hole (5112). A plurality of limiting holes (171) for inserting the fixing block (62) are provided on the housing. The limiting holes (171) are connected to the fixing hole (170). The plurality of limiting holes (171) are arranged radially with the center of the fixing hole (170) as the center.

7. The de-energized disc brake according to claim 6, characterized in that, A magnet (180) is provided on the inner wall of the fixing hole (170), and an iron piece (611) that attracts the magnet (180) is provided on the end wall of the fixing rod (61).

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